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Ari Pekka Mähönen

@apmahonen.bsky.social

1.4K followers 410 following 150 posts

Plant Developmental Biologist, Professor at University of Helsinki. Funded by #ERCCoG & #Treebio CoE Website: https://t.co/oFteNQ3WuH

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Ari Pekka Mähönen @apmahonen.bsky.social · Jul 2

How plants sense injury in their barrier tissue, periderm? Painstakingly detailed and amazing work by post doc Hiroyuki Iida shows that wounding is sensed by the diffusion of two gases: ethylene and oxygen. @treebiocoe.bsky.social‬ @erc.europa.eu‬ 1/x 🧵 www.nature.com/articles/s41...

Plants monitor the integrity of their barrier by sensing gas diffusion - Nature

A study using Arabidopsis shows that plants can monitor the integrity of their outer barriers by sensing gas diffusion, enabling them to initiate wound repair to prevent water loss and pathogen entry.

www.nature.com

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Reposted by Ari Pekka Mähönen

New Phytologist @newphyt.bsky.social · 3d

#TansleyReview: An updated history of TDIF-PXY signalling: a study in cell fate and tissue patterning

He et al. 👇

📖 nph.onlinelibrary.wiley.com/doi/10.1111/...

#LatestIssue #PlantScience

Comparison of wild-type and pxy pxl1 pxl2 er erl1 erl2 Arabidopsis thaliana plants.

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Ari Pekka Mähönen @apmahonen.bsky.social · 5d

Congrats also Feng Zhou and all the authors. This is a good example of how careful examination doesn’t lead to a more complicated model, but instead reveals a simpler one that actually makes sense!

Reposted by Ari Pekka Mähönen

nikogeldner.bsky.social @nikogeldner.bsky.social · 5d

A long road to the Cover of Science!
www.science.org/doi/10.1126/...

Localized glutamine leakage drives the spatial structure of root microbial colonization

Plant roots release exudates to encourage microbiome assembly, which influences the function and stress resilience of plants. How specific exudates drive spatial colonization patterns remains largely ...

www.science.org

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Ari Pekka Mähönen @apmahonen.bsky.social · 5d

Congrats Niko, beautiful stuff!

Reposted by Ari Pekka Mähönen

Stéphanie Robert @srobertgroup.bsky.social · 5d

This story blew my mind! Amazing work. Highly recommended. Congrats to all! @nikogeldner.bsky.social @tonnigrubeandersen.bsky.social

Localized glutamine leakage drives the spatial structure of root microbial colonization | Science www.science.org/doi/10.1126/...

Localized glutamine leakage drives the spatial structure of root microbial colonization

www.science.org

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Reposted by Ari Pekka Mähönen

Craig Primmer @fishcongen.bsky.social · 6d

Humane genetics and genomics position in Helsinki open for 9 more days!

Craig Primmer @fishcongen.bsky.social · Aug 16

3 prof positions open in Helsinki!

🧬Human genetics and genomics (open rank, DL 10.10)
🧬Cellular physiology (TT, DL 17.8)
🏙️ Ecological restoration of urban environments (open rank, DL 17.8)

www.helsinki.fi/en/about-us/...

Come and join us in the happiest country in the world 5 years running!

Open positions | University of Helsinki

Read about our range of career options and apply now. Application processes ends on the date indicated in the job ad at 23.59 local Helsinki time (EEST).

www.helsinki.fi

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Reposted by Ari Pekka Mähönen

New Phytologist @newphyt.bsky.social · 7d

🐰 RABBIT EARS directly regulates WOX4 transcription and inhibits secondary growth in #Arabidopsis stem

📖 buff.ly/0thfFIy
by Thapa Chhetri et al.

@WileyPlantSci #PlantScience #cambium

Identification of a rbe-d mutant with reduced secondary growth.

nph.onlinelibrary.wiley.com

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Ari Pekka Mähönen @apmahonen.bsky.social · 7d

Webinar on Quantitative Approaches to Cellular Aspects of Plant Ion Homeostasis on Thursday October 16th: 3-4pm BST
www.cambridge.org/core/journal...

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Reposted by Ari Pekka Mähönen

Margot Smit @likeyoda1.bsky.social · 7d

Check out our new review in JXB:
tinyurl.com/yta6fd5b

@pablidopsis.bsky.social and I write about the cell's decision between division and differentiation. 🌱 What factors promote one or the other in different cell types? 🤔 Are they really mutually exclusive?

Validate User

tinyurl.com

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Reposted by Ari Pekka Mähönen

Michael Hothorn @structplantbio.bsky.social · 8d

Amazing work by the Santiago lab @unil.bsky.social. The malectin-LRR receptor kinase IGP1 senses cello-oligomers to alert the plant immune system & enhance disease resistance. Very nice discovery & mechanism.
www.biorxiv.org/content/10.1...

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Ari Pekka Mähönen @apmahonen.bsky.social · 15d

Congrats, Uli - well deserved!

Reposted by Ari Pekka Mähönen

Yasin Dagdas @plantophagy.bsky.social · 21d

This looks like a great opportunity: #Tenure-track assistant #professor position at University of Lausanne on #MPMI
career5.successfactors.eu/career?caree...

Career Opportunities: DBMV: Tenure Track Assistant Professor towards Associate Professor in the field of Plant-organism (22484)

career5.successfactors.eu

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Reposted by Ari Pekka Mähönen

Oxford Biology @biology.ox.ac.uk · 23d

Oxford Biology is growing 📢

We’re appointing 3 Associate Professors in:
🌱 Plant Sciences
🦉 Animal Behaviour
🔬 Molecular Cell Biology

3 fields. 3 opportunities. One new home for Oxford Biology.

Learn more 👉 bit.ly/41S2Tc7
Apply now 👉 bit.ly/488CNW3

Photo showing the inside atrium of the new Life and Mind Building

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Ari Pekka Mähönen @apmahonen.bsky.social · 26d

✨ To make this possible, we developed LRTracker (stable) and iLRTracker (inducible) with versatile reporters—powerful tools to study how e.g. environment controls LRP formation and the decision between LR and cambium fate. 3/3

Ari Pekka Mähönen @apmahonen.bsky.social · 26d

🔀 Key insights:
• Cytokinin pushes LRPs toward cambium fate via LBD3/4, PXY, WOX4.
• Auxin promotes lateral root (LR) fate in xylem pole pericycle (XPP) cells—but its power fades as roots mature.
• This reveals the plasticity of XPP cell lineage: cells can toggle between forming LRs or cambium. 2/x

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Ari Pekka Mähönen @apmahonen.bsky.social · 26d

🌱 What happens when lateral root primordia (LRPs) fail to emerge?
Using our new lineage tracing tool LRTracker, Xin discovered that arrested LRPs don’t just disappear—they gradually switch fate and become part of the cambium, contributing to secondary growth.1/x
www.sciencedirect.com/science/arti...

Hormonal regulation of cell fate plasticity of xylem-pole-pericycle lineage in Arabidopsis roots

In Arabidopsis roots, xylem-pole-pericycle (XPP) cells exhibit dual cell fates by contributing to both lateral root (LR) and cambium formation. Despit…

www.sciencedirect.com

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Ari Pekka Mähönen @apmahonen.bsky.social · Sep 5

Congratulations, Tina! It was great to meet you in the FASEB meeting. Good luck with your work.

Ari Pekka Mähönen @apmahonen.bsky.social · Sep 4

Fantastic - congrats Vinay! Well deserved!

Reposted by Ari Pekka Mähönen

Emmanuelle Bayer @emmanuellebayer.bsky.social · Jul 28

We have two open Post-Doc positions in my group at the interface with:
1- @ataly.bsky.social for molecular dynamics
2- Bruno Guillotin from protein mobility

Apply by sending CV, two ref letters and a short motivation letter to me : [email protected]. Deadline 15 sept.

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Ari Pekka Mähönen @apmahonen.bsky.social · Sep 1

Congrats, Tonni! See you in Zurich

Ari Pekka Mähönen @apmahonen.bsky.social · Aug 30

Timely review by Peter and colleagues on TDIF-PXY signalling!

Peter Etchells @peteretchells.bsky.social · Aug 30

Time flies when you are having fun. In 2016 we wrote a review marking 10 years of TDIF-PXY. Group members Qing and Agnieszka wrote an update, out today in @newphyt.bsky.social. Do have a read. nph.onlinelibrary.wiley.com/doi/10.1111/...

An updated history of TDIF‐PXY signalling: a study in cell fate and tissue patterning

Non-cell autonomous signalling is a mechanism by which stem cells are maintained across the tree of life. In plants, many stem cell populations are regulated by peptide ligands related to CLAVATA3, w...

nph.onlinelibrary.wiley.com

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Reposted by Ari Pekka Mähönen

Anna-Liisa Laine @annaliisalaine.bsky.social · Aug 26

We are recruiting‼️A permanent university lecturer position in BIOSTATISTICS is available at @helsinki.fi Faculty of Biological and Environmental Sciences. Great colleagues, excellent infrastructures and startup support 🙌🏻
DL 14 September

jobs.helsinki.fi/job/Helsinki...

University Lecturer in Biostatistics

jobs.helsinki.fi

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Reposted by Ari Pekka Mähönen

Ora Hazak @hazaklab.bsky.social · Aug 18

An open W2 Professorship position in Molecular Crop Improvement at my Institute @uni-muenster.de! Excellent scientific environment and great conditions for Plant Research 🔬🍅🫛🥒🌽🍓🍎🥔- now open for applications !

Plant Energy Biology Lab @schwarzlanderlab.bsky.social · Aug 18

Your research brings together fundamental plant biology & applied research to enhance crop traits? 🌱🌾🎓🏭

Join us as professor in 'Molecular Crop Improvement' @uni-muenster.de & @fraunhofer.bsky.social

Please PM if you got questions.

stellen.uni-muenster.de/jobposting/d...

Professorship (W2-level) in “Molecular Crop Improvement”

stellen.uni-muenster.de

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Reposted by Ari Pekka Mähönen

Kalika Prasad @kalikaprasad.bsky.social · Aug 12

A snapshot of the mechanics shaping organs: what plants and animals can teach each other.
Thank you Mabel, @MabelMathew_M and Ankita @Dash_Ankita
for putting this together.

authors.elsevier.com/a/1lamy3si8Q...

authors.elsevier.com

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Ari Pekka Mähönen @apmahonen.bsky.social · Aug 7

Nice.